The original, and most common spec (see Spec). A ControlSpec is used by GUI sliders and knobs to specify the range and curve of the controls. ControlSpec may be used in many ways to map from linear 0..1 range to your desired range and back.
The most common way to create a ControlSpec is by
anObject.asSpec // the object may be an array or a symbol| minval |
The minimum value of the range. |
| maxval |
The maximium value of the range. |
| warp |
a Warp, a symbol (e.g. \lin or \exponential: Default value is \lin), or something else that returns a Warp when sent the message .asWarp. A CurveWarp is defined by a number. |
| step |
The smallest possible increment. |
| default |
The default value. |
| units |
The units, e.g. "hz". Used by some gui's as a unit label. |
| grid |
Maps and constrains a value between 0 and 1 to the range between minval and maxval.
Maps and constrains a value between minval and maxval to the range between 0 and 1.
g = ControlSpec(0.01, 2000, \exp, 0.1, 220, "Hz");g.map(0.5); // convert from [0..1] to [0.01..2000]g.unmap(1000); // convert from [0.01..2000] to [0..1]// fore and back translation should be close to identical:g.unmap(g.map(0.5));The lower of maxval and minval.
The higher of maxval and minval.
Returns value.asFloat.clip(clipLo, clipHi).round(step).
Returns maxval - minval.
Used for EZ GUI classes for guessing a sensible step if none is specified.
Returns the AbstractGridLines subclass corresponding to the current spec, in particular its warp behavior.
Get/set an instance of the AbstractGridLines subclass that describes the range and warp behavior of the current spec, e.g. for use by DrawGrid for drawing grids in Plotter.
xxxxxxxxxxg = ControlSpec(0.01, 2000, \exp, 0.1, 220, "Hz");// or alternatively[0.001, 2000, \exp, 0.1, 220, "hz"].asSpec;// or add it to the ControlSpec.specs IdentityDictionary:ControlSpec.specs[\myFreq] = ControlSpec(0.01, 2000, \exp, 0.01, 440, units: "Hz");xxxxxxxxxx// array is used as arguments to ControlSpec.new(minval, maxval, warp, step, default)[300,3000,\exponential,100].asSpec.dumpInstance of ControlSpec { (0313FC08, gc=00, fmt=00, flg=00, set=03) instance variables [6] minval : Integer 300 maxval : Integer 3000 warp : Symbol 'exponential' step : Integer 100 default : Integer 300}// partially specified ...[-48,48].asSpec.dumpInstance of ControlSpec { (0313FF18, gc=00, fmt=00, flg=00, set=03) instance variables [6] minval : Integer -48 maxval : Integer 48 warp : Symbol 'linear' step : Float 0 default : Integer -48}// a Symbol\freq.asSpec.dumpInstance of ControlSpec { (180F4910, gc=3C, fmt=00, flg=00, set=03) instance variables [8] minval : Integer 20 maxval : Integer 20000 warp : instance of ExponentialWarp (17FEDB30, size=1, set=1) step : Integer 0 default : Integer 440 units : " Hz" clipLo : Integer 20 clipHi : Integer 20000}// nil becomes a default ControlSpecnil.asSpec.dumpInstance of ControlSpec { (0313FF18, gc=00, fmt=00, flg=00, set=03) instance variables [6] minval : Float 0 maxval : Float 1 warp : Symbol 'linear' step : Float 0 default : Float 0}xxxxxxxxxx// make a frequency spec with an exponential range from 20 to 20000,// give it a rounding of 30 (Hz)a = \freq.asSpec;a.step = 100;// equivalent:a = [20, 20000, 'exp', 100, 440].asSpec;a.dump;a.constrain(800); // make sure it is in range and round it.a.constrain(803); // make sure it is in range and round it.a.map(0.5);a.map(0.0); // returns mina.map(1.5); // exceeds the area: clip, returns maxa.unmap(4000);a.unmap(22.0);xxxxxxxxxx// like in envelopes, a CurveWarp is created by a number:a = [0, 1, -4].asSpec;a.map(0.5);a.unmap(0.99);a.map((0..10).normalize).plot;// look at different distributions:(var invals = (0..10).normalize;(-4..4).do { |curve| var a = [0, 1, curve].asSpec; a.map(invals).plot;});xxxxxxxxxx// using spec for sliders:(var w, c, d;w = Window.new("control", Rect(128, 64, 340, 160));w.front;c = Slider.new(w, Rect(10, 10, 300, 30));d = StaticText.new(w, Rect(10, 40, 300, 30));c.action = { d.string = "unmapped value" + c.value.round(0.01) + "......" + "mapped value" + a.map(c.value)};)xxxxxxxxxx// ControlSpec-map can also be used to map ugens(var spec;spec = [ 100, 18000, \exp].asSpec;{ var freq,osc; osc = SinOsc.kr(0.1).range(0,1); freq = spec.map( osc ); freq.dump;// BinaryOpUGen SinOsc.ar( freq.poll )}.play)